B.Tech. (Department of Tourism and Hospitality Management, Faculty of Human Sciences), Vaal University of Technology / The primary objective of this study was to investigate the relationship between marketing effectiveness and the marketing mix of guesthouses in the Vaal Region. This goal was achieved by firstly exploring the application of marketing and marketing effectiveness in the tourism industry through a literature study. Based on the literature study a questionnaire was developed and a survey conducted to analyse the marketing mix as well as marketing effectiveness of guesthouses and the relationship between these two as possible factors influencing both. Marketing is a very important management function in any business. It is a process focused on matching the right customer with a certain product or service in order to satisfy their wants and needs. Marketing can create a competitive advantage for organisations which influences the success and longterm profitability of the organisation. The marketing approach for small organisations differs from that of larger organisations due to limited resources, lack of specialist expertise and a limited impact in the marketplace. Smaller organisations such as guesthouses seem to handle marketing in a more informal and unstructured manner and thereby underestimating the value and role of marketing. Marketing is directly influenced by the application of the four Ps, namely product, price, place and promotion. The planning and application of the four Ps, however, contributes to successful marketing. The question is whether guesthouse owners realise this. Research was undertaken at the guesthouses in the Vaal Region to determine the relationship between the marketing mix and marketing effectiveness through the eyes of the consumer, since they need to react to the marketing material. A total of 500 questionnaires were distributed of which 451 were completed by the visitors. v Firstly, the data was used to compile tables and graphs to interpret the descriptive data: demographic profile of respondents, travel preferences of respondents, a descriptive view of the marketing mix elements and the effectiveness of marketing for guesthouses. Secondly, by means of a factor analyses, the marketing mix elements were grouped according to price, place, product, promotion (advertising) and promotion (contact), and the marketing effectiveness elements were grouped according to quantity control and quality control. Product was found to be the most important element of the marketing mix and quality control was found to be the most important element of marketing effectiveness. Thirdly, no significant differences were found on the marketing mix elements and the marketing effectiveness factors and gender and marital status. The spearman rank order correlations revealed that older people consider product as a marketing mix element to be less important. Frequent travellers consider promotion (advertising), promotion (contact) and quality control to be less important. Lastly, definite correlations were found between the marketing mix elements and the marketing effectiveness factors. This implies that even smaller guesthouses should implement the marketing mix elements which can assist in improving the marketing effectiveness of the guesthouse. Guesthouses will yield better results when implementing the marketing mix effectively. This study contributes to the information that already exists concerning the marketing mix and marketing effectiveness but more in terms of the relationship between the two.